/*
 *  Copyright 2011 yura.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *  under the License.
 */

package org.opu.vcforms.template.hf;

import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;

/**
 *
 * @author yura
 */
@Root(name="headers-footers")
public class HeadersFooters implements Iterable<HeaderFooter>{

    @ElementList(inline = true, required = false, type = HeaderFooter.class)
    private List<HeaderFooter> headerFooter;

    public List<HeaderFooter> getHeaderFooter() {
        return headerFooter;
    }

    public void setHeaderFooter(List<HeaderFooter> headerFooter) {
        this.headerFooter = headerFooter;
    }

    @Override
    public Iterator<HeaderFooter> iterator() {
        return headerFooter.iterator();
    }

    public boolean isEmpty(){
        return headerFooter != null && headerFooter.isEmpty();
    }

    public SortedMap<Integer, HeaderFooter> asMap() 
            throws IllegalArgumentException {

        Map<Integer, HeaderFooter> map = new HashMap<Integer, HeaderFooter>();

        for (HeaderFooter hf : headerFooter) {
            if(map.put(hf.getPage(), hf) != null){
                throw new IllegalArgumentException("Dublication of headers: " + hf.getPage());
            }
        }

        // return in sort order
        return new TreeMap<Integer, HeaderFooter>(map);
    }
}
